Fix loading of koji_krb_keytab option
Fix loading of koji_krb_keytab option

Due to a rename during the review, we ended up adding a typo.

Change-Id: I617f70a8d6e39547bca3794576e260a64079dc5d

openstack-packages/delorean,openstack-packages/DLRN,openstack-packages/DLRN,openstack-packages/delorean